Use default package path, remove appveyor

We won't use it anymore, so default path is needed for pack and publish

Author: kzu

appveyor.yml

@@ -26,7 +26,6 @@
 		<PackageRequireLicenseAcceptance>False</PackageRequireLicenseAcceptance>
     <PackageReleaseNotes>A changelog is available at https://github.com/moq/moq/blob/main/CHANGELOG.md.</PackageReleaseNotes>
     <NoPackageAnalysis>True</NoPackageAnalysis>
-		<PackageOutputPath>$(OutputDirectory)</PackageOutputPath>
 		<PackageTags>moq;tdd;mocking;mocks;unittesting;agile;unittest</PackageTags>
 		<PackageProjectUrl>https://github.com/moq/moq</PackageProjectUrl>
 		<RepositoryUrl>https://github.com/moq/moq</RepositoryUrl>